Publication
Tortuosity variation in a low density binary particulate bed
| dc.contributor.author | Dias, Ricardo P. | |
| dc.contributor.author | Teixeira, José | |
| dc.contributor.author | Mota, Manuel | |
| dc.contributor.author | Alexander, Yelshin | |
| dc.date.accessioned | 2012-06-11T08:11:26Z | |
| dc.date.available | 2012-06-11T08:11:26Z | |
| dc.date.issued | 2006 | |
| dc.description.abstract | The importance of particle size ratio and particle composition in the properties of a mixed bed is well known. Nevertheless, the dependence of the bed channel tortuosity T on the porosity ε in the form T=1/εn, where n is assumed to be a constant, shows that the value of n depends on the properties of the packed bed. For loose packing, experimental data for binary mixtures of glass beads of a size ratio from 1 up to 53.8 was analysed in terms of porosity, tortuosity and permeability. The packing procedure was performed without intensive compacting methods e.g. vibration, etc. Obtained results show that the parameter n is a function of the volume fraction of large particles xD and, for spherical particles, lies in the range 0.4–0.5. The explanation for this variation is (1) a distortion effect on the small particles arrangement occurring near the large particle surface; (2) in the region of minimum porosity, near contact points of large particles, the occurrence of dead zones that are free of small particles. A relationship accounting for this effect is proposed that may be useful for the analysis of transport phenomena in granular bed filters, chromatographic columns, etc. | por |
| dc.description.sponsorship | FCT, FEDER | por |
| dc.identifier.citation | Dias, Ricardo P.; Teixeira, José A.; Mota, Manuel; Alexander, Yelshin (2006). Tortuosity variation in a low density binary particulate bed. Separation and Purification Technology. ISSN 1383-5866. p.180-184 | por |
| dc.identifier.issn | 1383-5866 | |
| dc.identifier.uri | http://hdl.handle.net/10198/7038 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | Elsevier | por |
| dc.relation | POCTI-EQU-37500-2001 | por |
| dc.relation | Porous Media Properties and Separation of Macromolecules | |
| dc.subject | Particle mixtures | por |
| dc.subject | Binary spheres packing | por |
| dc.subject | Size ratio | por |
| dc.subject | Porosity | por |
| dc.subject | Tortuosity | por |
| dc.title | Tortuosity variation in a low density binary particulate bed | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.awardTitle | Porous Media Properties and Separation of Macromolecules | |
| oaire.awardURI | info:eu-repo/grantAgreement/FCT/POCI/POCTI%2FEQU%2F37500%2F2001/PT | |
| oaire.citation.endPage | 184 | por |
| oaire.citation.startPage | 180 | por |
| oaire.citation.title | Separation and Purification Technology | por |
| oaire.fundingStream | POCI | |
| person.familyName | Dias | |
| person.givenName | Ricardo P. | |
| person.identifier.orcid | 0000-0003-1503-998X | |
| person.identifier.scopus-author-id | 7102885151 | |
| project.funder.identifier | http://doi.org/10.13039/501100001871 | |
| project.funder.name | Fundação para a Ciência e a Tecnologia | |
| rcaap.rights | openAccess | por |
| rcaap.type | article | por |
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